Power-transmitting device.



, PATENTED'APR. 14, 1903. A. W. WIGGLESWORTH & C. H. NORSTROM.

POWER TRANSMITTING DEVICE.

APPLIQATION FILED SEPT. 2. v1902.

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TH: "Cams PETERS co No. 725,387. PATENTED APR. 14, 1903. v A. W. WIGGLESWORTH & C. H.A NORSTROM.

POWER TRANSMITTING DEVICE.

P PLIOATION FILED SEPT. 2. 1902. No M0921.. 2 SHEETS-SHEET 2.

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UNITED STATES PATENT i OFFICE.

v ALBERT W. -WIGGLEswoR'rH AND CARL H. NORsTROM, lOE CHICAGO,`ILLI NOIs, AssIcNORs TO CHICAGO MACHINE TOOL COMPANY, OE CHICAGO, ILLINOIS, A CORPORATION OE ILLINOIS. f

'POWER-TRANSMITTlNG DEVICE.

SPECIFICATION forming` part f Letters Patent N o. 725,387, dated April 14, 1903'.

Application liled September Z, 190.2. Serial No. 121,721.. (No model.) n

To LZZ whom it may concern.'

Be it known that we; ALBERT W.WIGGLEs WORTH and CARL H. NORsTRoM, of Chicago, in the county of Cook and State ot' Illinois, have invented certain newand'usefnl lm provements in Power-Transmitting Devices;-

and we do hereby declare that the following is a full, clear, and exact description there of, reference being had tothe vaccompany- Io ing drawings, and to the lettersof reference marked thereon, which form a part ofthis speciiication. p

Thisinvention relates Ato improvements in power-transmitting devices for use in Ina-- I5 chine-shops and designed for transmitting power from an overhead rotary drivi 11g-shaft to a machine beneath the same;

The invention consists'in the matters here` inafter set forth, and more particularly pointzo ed out inthe appended claims.

y In the drawings, Figure l is a lperspective view of a power-transmittingdevice made in accordance with our inventio'n, showingthe l same in position on a ceiling or.like super-L structure.

Fig. 2 is aview, partly in vertical central section, of said mechanism. 3 is a top plan view of said mechanism with the su pporting-bracket shown in section. Fig.

4 is a detail horizontal section taken Online 3o el 4 of Fig. 2. Fig. 5'is a fragmentary view, partially in plan and partially in horizontal section, showing the mechanism for shifting the movable member of. said transmitting de-V vice. Fig. 6 is an, axial sectionof the main supporting-shaft, on which the rotative members of the mechanism aremounted, showing the means for applying a lubricant to the bearings between said rotative members and the shaft.

non-rotatively fixed therein by means of set-V of said bracket-arms, i Said bars are fixed toserve as transverse frame members to'rigidly Fig. v ,tative by means of'projections o3 thereon,

As shown inthe drawings, A designates a' screws l), extendinginto said openings and im- 5o pinging at their inner ends against said shaft. The transverse bars B extend between said bracket-arms and intoalinedopenings formed in suitable enlargements'b at the upper ends said bracket-'arms'by means of set-screws b2, passing into said openings and impinging against said bars. The bars B may be made ofJ short pipe-sections, and are designed to 6o connect the bracket-arms B at Vtheir `upper ends. ,Y Loosely mounted on the shaft Amare two rotative pulleys C D; The pulley C is made larger` than the pulley D and comprises an annular rim c, a central hub o, and radial arms or spokes c2, extending `between the hub and rim. The hub of said pulley C is conlined from endwise movement on the'shaft-A between a collar dat the inner end ofthe hub 7.o

-c' and a second collar a between'said hub and the adjacent bracket-armB. The collar ct is affixed to the shaft A Aby means Ofa setscrew a2, and the collar o." is made nonfrowhich enternotchesin theadjacentface of the associated bracket-arnrB, as clearly shown in Fig. 2. y

The pulley D is provided 'with a central hub d, which is connected with the rim d' of the pulley by means of a at web or liange d2 Vat the end ot' the pulley remote from the pulley C. Said pulley is movable longitudinally of the shaft toward and fromy the pulley C, and said pulleys are provided with complementalfrictionalsurfaces,which when brought into engagement are adapted to transmit rotary motion from one pulley to the other. Said; pulley D is herein shown as provided at its end adjacent to the pulley C with a wide radial annular ilange D,` which is made of less diameter than the` rim c of the pulley C and is adapted to enter said rim when the pulley D is moved endwise of `the shaft ytoward the pulley C. Thel margin of said Iiange D .is made tapered and is adapted to engage a corresponding tapered surface on the inner face of the adjacent` marginV of the rim of the pulley C when said pulley D is moved endwise into engagement with the pulley C. Said pulleyDis provided at its end remote from the fiange D with an annular radial flange d3, which constitutes, iu effect, an extension of said web d2. The belt associated with said pulley is confined bey tween said flanges D and d3.

driving engagement with each other.

The pulleyCis adapted to be continuously driven by means of a suitable belt from an overhead shaft, and the pulley D is adapted to be operatively connected by a belt with a machine beneath the same to be driven from said overhead shaft. So far as the broader aspect of the invention is concerned either pulley may be the movable pulley and be moved toward the other to bring the com plemental frictional surfaces thereof ino s herein shown, the pulley D is the shiftable pulley and the pulley C is stationary endwise of the shaft and is hereinafter termed the stationary pulley.

Means are provided for shifting the pulley D longitudinally of the shaft toward and from the stationary pulley, the shifting devices being made as follows: Said pulley D is provided at its end remote from the pulley C with a tubular extension or sleeve D2, which constitutes, in eect, an extension of the hub d and which has rotative bearing on the shaft A. The outer end of said extension or sleeve is provided with a narrow annular radial ange d4. The space between the bracket-arm B, adjacent to the tubiilar extension D2 of the wheel, and the pulley C is made of greater length than that of the combined length of said pulleyD and its tubular extension or sleeve D2 in order to give ample room for the shift-ing movement of the pulley to move the same into and out of driving connection with the pulley C.

E designates a horizontal rock-shaft, which is disposed at right angles to the shaft A and` is mounted in a horizontal bearing-arm B2, projecting forwardly and laterally from the lower end of the bracket-arm B adjacent to vthe pulley D. The shaft is held from endwise movement in its bearing by means of a screw e, extending through the bearing-sleeve and engaging at its inner end an annular groove e in said shaft, as shown in Figs. 3 and 4. A second horizontal bearing-arm B2 is formed on said bracket-arm B on the side thereof remote from the arm in which the shaft E is mounted. The purpose of the two bearing-arms is to enable the shifting device for the movable pulley to be operated from either side of the device. The inner end of said rock-shaft extends toward the extension or sleeve D2 of the pulley D into the space between the fianges cl2 d4 thereof. Said inner end of the rock-shaft is provided with aneccentric or crank' portion E', on which 'is rotatively mounted a bearing-roller E2. Said bearing-roller is adapted to be brought into engagement with either of the flanges d2 (Z4 by partial rotation of the rock-shaft in the proper direction. The engagement of said roller with either of the flanges by movement of the rock-shaft described acts to move the pulley D into or out of engagement with the pulley C, depending upon the direction of rotation of said shaft. The flanges d2'd4 constitute shoulders on thepulley D, which'coact with the eccentrica]ly-constructed rockshaft to shift said pulleys in both directions of its movement, and said shoulders may be otherwise constructed. The means for imparting rocking motion to said shaft E consists of a weighted lever F, which is nonerotatively fixed between its ends to said rockshaft. As herein shown, said lever is provided with a hubf, which fits over the outer endl of said rock-shaft E, and said hub is fixed rigidly to said shaft by means ot' a setscrew f', extending through the hub and impinging against the shaft. When .said rock-shaft is occupying one limit of its rotative movement, and therefore is holding the roller E2 in engagement with the liange d2 or d4 of the pulley D, the actuating-lever F occupies an inclined position, as clearly shown in Fig. 1. Said actuating-lever is provided at its upper end with a weight F', which is sufficiently heavy to hold the shiftable pulley D in frictional engagement with the pulley C and to throw said pulley D into and out of engagement withr the 'pulley C. Said weight is attached to the lever by means of a set-screwf2, extending through the weight and impinging against the leverin the manner clearly shown in Fig. 5. The lower Vend of the lever is adaptedfor connection with a cord or cable F2, by means of which said lever is swung on its axis to rock the shaft E and move the IOO eccentrically-located roller E2 into engagey IIO ver to a vertical position by a sharp pull on the cord or cable F2,-and the momentum of the moving weight and the weight thereof are sufficient to complete the throw of the lever and rotate the rock-shaftto the limits of its movements, and thereby force the pulley D into driving engagement with the pulley C or release saidpulleys from each other. The set-screw f2, by which the weight is fixed to the lever F, engages the bearing-arm B2 when the lever is swung away from the pulley C and serves as a stop to limit the outward swing of said lever. The roller E2 is made of a diameter less than the distance between the flanges D' d3, so that the lever F may have a lost motion when the same is thrown over to shift the pulley D, and thereby impart to said lever from the weight F a momentum which facilitates the starting of the movable pulley. This is especially useful when shifting the movable pulley away from the stationary pulley, as some force is required to separate the coacting friction- -for the device, consisting of the vertical bracket-arms, which are ailxed rigidly to surfaces of the pulleys whenV made as Vherein shown. p Y

The roller E2on the eccentric or crank portion of the rock-shaft Eis provided merely for the purposeof minimizing the friction between the operative parts of the eccentrically actuating devices, andV it isobvious that such' rolling or antifriction contact of -the parts may be otherwise effected than herein shown.

Provision is made for taking up wear between the stationary and shifting pulleys, so as to insure that the movement given to the -shifting pulley by the actuating-lever F is at all times sufficient vto bring the friction-surfaces of said pulleys into proper driving relation. Said take-up or adjusting means are shown in Fig. 4 and consist of two horizontal screw-shafts a4 a4,which extend through horizontal screw-threaded openings in the lower end of the bracket-arm B, adjacent to the stationary pulley C, and are'adapted to bear against the projections 0,3 of the collar et', in-I s tei-posed between thehub of said pulley and' the adjacent bracket-arm. Said screw-shafts are provided with jam-nuts c5 for holdingthe same in iixed'adjusted positions and are also provided at their outer ends with heads adapted for engagement bya suitable imple-` nent for adjusting said shafts and the col-4 ar c.

As before stated, either of the pulleys C' and D may be the continuously-driven pnl# ley and through which power is transmittedto the device from an overhead rotary shaft.. Ordinarily, as the device herein shown is con` structed, the pulley D is connected directly with the machine to be driven, for the reasonl that the machine will usually be driven atl greater speed than the overhead shaft. It' will be observed that the movement of the the shifting pulley is not great, so that the shifting of the pulleyD to throw the same into or out of engagement with the pulleyCA will have little or no effect to disturb thel driving relation of the belt which connects' Y the pulley D with the machine which is being d riven.

The construction of the supporting-bracket gether at their upper ends by the cross-bars B', which 'are detachably connected with said arms in the manner stated, combined with the supporting-shafts A, detachably fixed to thelower ends of said arms, is ofI considerable importance, as it enables the dei vice as a wholefto be made wider for the reception of longer pulleys while using the same bracket-arms. When it is desired to insert pulleys lhaving wider bearing-faces, the bars' B' and shaft VA are removed and longer ones' substituted in order to increase the length of" Svi the manufacture of said devices itis neces-vv sary to make bracket-arms of but one size or dimension for pulleys of given diameters, and

the length thereof maybe readily altered zto correspond with'differentlengths of pulleys; to be used by the use of bars B and shaft A of proper length. i

Provision is made for lubricatingthe bear' ings between the shaft A and the pulleys C and D. As herein shown, said shaft isnrovided at its end with axial passagesca,

`which communicate at their inner ends with4 the ends-of the shaft A', and said extensions of the grease-cups are provided withcentral passages which communicate with the interior of the cups and with thepassages 61.6, The grease-cups are provided with closing-caps G', by which the lubricant placed therein is confined and by which itis forced through the passages referred to into the bearings. when the caps are screwed inwardly upon the cups.` Similarly the bearing between the eccentric or crank portion of the rock-shaft AE and the roller E2 is adapted to be lubricated. Said rock-shaft is for this purpose provided with an axial passage e2, which communicates-with a radial passage e3,extending to the outer sur-f face of the crank portion ofthe shaft andv communicating with a shallow groove e4 in passages into the bearings between the crank portion of said shaft and said roller E2.'

It is obvious that certainof the structural details herein shown may he varied without departing from the spiritV of our invention, and` we do not wish to be limited to such de' tails, excepting as hereinafter made the subject of specific'claims; derstood that the combinations setforth in the several claims are intended to beseparately claimed without limitation to the use in connection therewith of other features and details of construction illustrated,but not enumerated, in such claims.

We claim as our inventionl. A power-transmittingdevice comprising two rotative pulleys, one of which is movable toward and from the other Apulley and both provided with com ple mental friction-surfaces adapted 'to be moved into and out of contact by movement of themovable pulley, a rockshaft provided with an eccentric part adapted to shift the movable pulley in b'oth directions of its movement, a vertically-swinging lever for rocking said shaft and a weight on the IIO It is also to be nnupper end of said lever, said lever being connected with the movable pulley by means affording a lost motion between said parts.

2. A power-transmitting device comprising a non rotative shaft, two pulleys loosely mounted thereon and provided with compleniental friction-surfaces, one of which is stationary, longitudinally of the shaft, and the other of which is movable toward and from the stationary pulley, whereby said complemental friction-surfaces may be moved into and out of contact, said movable pulley being provided with longitudinally-separated shoulders, a rock-shaft having an eccentric portion located between said shoulders and coacting therewith to shift the movable pulley toward either limit of its movement, said shoulders being separated a distance to afford lost motion between said shoulders and said rock-shaft, and a weight coacting with said rock-shaft for effecting the final shifting of the movable pulley and holding said pulley at the limit of its movement.

A power-transmitting device comprising a non -rotative shaft, fwo pulleys loosely mounted thereon, and provided with complemental friction-surfaces, one of which is stationary, longitudinally of the shaft, and the other of which is movable toward and from the stationary pulley, whereby said complemental frictional surfaces may be moved into and out of contact, said movable pulley being provided with longitudinally-separated shoulders, a rock-shaft having an eccentric portion located between said shoulders and coacting therewith to shift the movable pnlley toward either limit of its movement, a weight coa'cting with the rock-shaft for effecting the final shifting of the movable pulley and holding said pulley at either limit of its movement, and an antifriction bearing roller on the eccentric portion of the shaft and made of a diameter less than the distance between said shoulders.

i. A power-transmittingdevice comprising two rotative pulleys, one of which is movable toward and from the other pulley, said pulleys being provided with complemental friction-surfaces adapted to be moved into and out of contact by movement of the movable pulley, a rock-shaft provided with an eccentric part adapted to shift the movable pulley in both directions of its movement, a vertically-swinging lever for rocking said shaft, a weight on the upper end of said lever, and a cord or cable attached to the lower end of said levell and depending therefrom, said lever being connected with the movable pulley by means affording a lost motion between the said parts.

5. Apower-transmitting device comprising a non-rotative shaft, two pulleys rotatively mounted thereon, two collars which are adjustably fixed to said shaft and between between and connecting the lower ends of said hangers, two pulleys rotatively mounted on said shaft, one of which is stationary longitudinally of the shaft, and the other of which is movable toward and from the first-mentione'd pulley, collars adjustably fixed to said shaft on either side of the hub of the' sfationary pulley for confining said stationary pulley, and adjusting-screws having screwthreaded engagement with one of the hangers and adapted to bear against one of said collars.

7. A power-transmittingdevice comprising a non rotative shaft, two pulleys mounted loosely thereon, one of which is stationary, longitudinally of the shaft, and the other of which is movable toward and from the stationary pulley, said pulleys being provided with complemental friction-surfaces adapted to be moved inf-o and out of contact by movement of the movable pulley, said movable pulley being provided with longitudinallyseparated shoulders, a rock-shaft having an eccentric portion located between said shoulders and coacting therewith to shift the movable pulley toward either limit of its movement, a weight coacting with .the eccentric shaft for effecting the final shifting of the movable pulley in either direction and holding said pulley at the limit of its movement, and means for adjusting said stationary pulley toward the movable pulley.

8. A power-transmitting device comprising a non rotative shaft, two pulleys loosely mounted thereon, two collars affixed tothe shaft and adjustable longitudinally of the shaft, one of Said pulleys being confined bctween said collars and the other being movable toward and from the first pulley, said pulleys being provided with complemental frictional surfaces adapted by movement. of

the movable pulley to be moved into and out of confact,an eccentric,and a Weight coperating with the eccentric for effecting the shift.- ing of the movable pulley foward and from the other pulley.

In testimony that we claim the foregoing as ourinvention we affix our signatures, in presence of two witnesses, this 21st day of August, A. D. 1902.

ALBERT W. WIGGLESWORTH. CARL H. NORSTROM.

Witnesses:

i/VILLIAM W. HALL, GEORGE R. WILKINS.

IOC 

